SSRT2330 Potential Security Vulnerability in rpc.yppasswdd (rev.1)

From: Security Alert (secure_at_cup.hp.com)
Date: 06/24/03 

Date: 24 Jun 2003 09:05:04 -0700

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**REVISED 01**
 Source: HEWLETT-PACKARD COMPANY
 SECURITY BULLETIN: HPSBUX0302-242
 Originally issued: 12 February 2003
 SSRT2330 Potential Security Vulnerability in rpc.yppasswdd
 Last revised: 23 June 2003
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NOTICE: There are no restrictions for distribution of this
Bulletin provided that it remains complete and intact.

The information in the following Security Bulletin should be
acted upon as soon as possible. Hewlett-Packard Company will
not be liable for any consequences to any customer resulting
from customer's failure to fully implement instructions in this
Security Bulletin as soon as possible.

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PROBLEM: Potential security vulnerability in rpc.yppasswdd

IMPACT: Potential denial of service, unauthorized access.

PLATFORM: HP 9000 Series 700 and 800 running HP-UX B.10.10,
          B.10.20, B.11.00, B.11.11, B.11.22 using rpc.yppasswdd.

**REVISED 01**
SOLUTION: For B.10.20 until a patch is available install the
          appropriate rpc.yppasswdd from the ftp site listed
          below.
          For B.11.00 install PHNE_28102.
          For B.11.11 install PHNE_28103.
 --> For B.11.22 install PHNE_28138.

MANUAL ACTIONS: Yes - NonUpdate
                For B.10.20 install rpc.yppasswdd_10.20.
                For B.11.00 install PHNE_28102, no manual action.
                For B.11.11 install PHNE_28103, no manual action.
 --> For B.11.22 install PHNE_28138, no manual action.

AVAILABILITY: The preliminary files are available now.
               This bulletin will be revised when patches
               are available.

CHANGE SUMMARY: Rev.01 - Added fix for B.11.22.
                         Changed o/s revision format to that
                         returned by "uname -a". 11.11 -> B.11.11.
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 A. Background
    A potential buffer overflow has been reported
    in rpc.yppasswdd.

    The SSRT thanks LSD Research Group (http://lsd-pl.net) for
    reporting this potential vulnerability to HP.

 B. Recommended solution
    Note: Customers running HP-UX revision 10.10 should
          write to security-alert@hp.com for more information.

**REVISED 01**
    AFFECTED VERSIONS

     The following is a list by HP-UX revision of
     affected filesets and the fileset revision or
     patch containing the fix. To determine if a
     system has an affected version, search the
     output of "swlist -a revision -l fileset"
     for an affected fileset, then determine if
     a fixed revision or the applicable patch is
     installed.

     HP-UX B.10.10
     =============
     NFS.NIS-SERVER
     fix: write to security-alert@hp.com for more information

     HP-UX B.10.20
     =============
     NFS.NIS-SERVER
     fix: Download and install rpc.yppasswdd_10.20
          as described below.

     HP-UX B.11.00
     =============
     NFS.NIS-SERVER
     fix: Install PHNE_28102 or subsequent.

     HP-UX B.11.11
     =============
     NFS.NIS-SERVER
     fix: Install PHNE_28103 or subsequent.

     HP-UX B.11.22
     =============
 --> NFS.NIS-SERVER
 --> fix: Install PHNE_28138 or subsequent.

    For 10.20 the following preliminary fix is available:

      rpc.yppasswdd_10.20
        cksum rpc.yppasswdd_10.20
        575931685 28672 rpc.yppasswdd_10.20
        MD5 (rpc.yppasswdd_10.20) =
               cf362f855dbb9493282686cf4823afec

         If you wish to verify the md5 sum please refer to:

               HPSBUX9408-016
               Patch sums and the MD5 program

     Download the appropriate files from the ftp site.
     These files are temporary and will be deleted when
     patches are available.

        System: hprc.external.hp.com (192.170.19.51)
        Login: yppass
        Password: yppass

        FTP Access: ftp://bind:bind1@hprc.external.hp.com/
                or: ftp://bind:bind1@192.170.19.51/

        ftp://yppass:yppass@hprc.external.hp.com/
        ftp://yppass:yppass@192.170.19.51/

         Copy the appropriate file to a protected directory
         (called "<new_rpc.yppasswdd_path>" below) and rename it
         "rpc.yppasswdd".

         /sbin/rc2.d/S410nis.server stop
         cd /usr/lib/netsvc/yp
         cp rpc.yppasswdd rpc.yppasswdd.orig
         cp /<new_rpc.yppasswdd_path>/rpc.yppasswdd rpc.yppasswdd
         /sbin/rc2.d/S410nis.server stop

 C. To subscribe to automatically receive future NEW HP Security
    Bulletins from the HP IT Resource Center via electronic
    mail, do the following:

    Use your browser to get to the HP IT Resource Center page
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    to the current Security Patch Matrix. Updated daily, this
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    For information on the Security Patch Check tool, see:
    http://www.software.hp.com/cgi-bin/swdepot_parser.cgi/cgi/
    displayProductInfo.pl?productNumber=B6834AA

    The security patch matrix is also available via anonymous
    ftp:

    ftp://ftp.itrc.hp.com/export/patches/hp-ux_patch_matrix/

    On the "Support Information Digest Main" page:
    click on the "HP Security Bulletin Archive".

 D. To report new security vulnerabilities, send email to

    security-alert@hp.com

    Please encrypt any exploit information using the
    security-alert PGP key, available from your local key
    server, or by sending a message with a -subject- (not body)
    of 'get key' (no quotes) to security-alert@hp.com.

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(c)Copyright 2003 Hewlett-Packard Company
Hewlett-Packard Company shall not be liable for technical or
editorial errors or omissions contained herein. The information
in this document is subject to change without notice.
Hewlett-Packard Company and the names of HP products referenced
herein are trademarks and/or service marks of Hewlett-Packard
Company. Other product and company names mentioned herein may be
trademarks and/or service marks of their respective owners.

 ________________________________________________________________

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--
Yours truly,
HP S/W Security Team
WTEC Cupertino, California
Return-Path: secure@cup.hp.com
Reply-to: security-alert@hp.com